ABB it has a large family of contacters: tripolar contacters and overload relays for engine startup and power switching (AF, minicontactors, AS), tetrapolars for switching the power (AF and minicontactors), auxiliary for the switching of auxiliary circuits (AS and minicontactors), for the switching of capacitors (UA.RA), CC.
The reference 1SAH100000R9900 specifically, is a contacter, relay.
Its features are: Nominal control power voltage Us in CC: 12V, Drive voltage type: CC, nominal operating current Ie, 400 V: 4A, auxiliary circuit connection type: threaded connection, assembly type: DIN rail, Number of auxiliary contacts normally opened: 4.